[NSRCA-discussion] beep tones

[George Kennie]

I have a question that came up at ther flying field yesterday.
The query was: What produces the arming tone and the cell count tones that
are
audible when the battery is plugged in to an electric motor powered model?

There were guys that were adament that the tones were produced by the
current
surging through the motor.

There was confusion due to the fact that no visible speaker could be
observed.

I felt that there had to be nano oscillator circuits in the esc working some
kind of a
nano piezo circuit generating the required tones, but I really had no idea.

Can somebody please clear up the confusion, ? anybody,? Peter???

Thanks

Georgie
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